Hydraulic actuating mechanism for mobile loading apparatus



y 1948- N. E. 'TORGERSEN. 2, ,160

HYDRAULIC .ACTUATING MECHANISM FOR MOBILE LOADING APPARATUS Filed Nov. 2, 1946 3 Sheets-Sheet '1 ATTORNEY y 1948- I N. E. TORGERSEN 2,445,160

HYDRAULIC ACTUATING MECHANISM FOR MOBILE LOADING APPARATUS Filed Nov. 2, 1946 3 Sheets-Sheet 2 H H! H H l!!! H 4!!! m! WAW 0 O Q INVENIOR:

CD NORMA/V E. TORGERSEN L: BY

July 13, 1948. N. E. TORGERSEN HYDRAULIC ACTUATING MECHANISM FOR MOBILE LOADING APPARATUS 3 Sheets-Sheet 3 Filed Nov. 2, 1946 Fi .5. g----------- INVENTOR:

Patented July 13, 1948 UNITED STATES PATENT OFFICE HYDRAULIC ACTUATING MECHANISM FOR MOBILE LOADING APPARATUS Norman E. Torgersen, Bowling Green, Ohio, as-

signor to The Daybrook Hydraulic Corporation, Bowling Green, Ohio, a corporation of Ohio Application November 2, 1946, Serial No. 707,401 6 Claims. (Cl. 212-30) This invention relates to hoisting apparatus in the art will permit. In the accompanying drawwhich an overhanging loading boom is capable of ings there has been illustrated the best embodiangular swinging movement about a vertical axis, ment of the invention known to me, but such emand more specifically to hoisting apparatus or bodiment is to be regarded as typical only of cranes of the mobile kind. 5 many possible embodiments, and the invention is It is among the objects of this invention to not to be limited thereto. provide simple hydraulically operated means for The novel features considered characteristic efiecting such movement. of my invention are set forth with particularity According to this invention a single hydraulic in the appended claims. The invention itself,

actuating cylinder controls the swinging move- B b a t Organization and its ment of the boom in both directions. To this method of operation, together with additional obend the cylinder is provided with a two-ended pisjects and advantages thereof, will best be underton rod. Each free end extends outwardly from stood from the following description of a specific the respective end of the cylinder into contact embodiment when read in connection with the with an abutment member or resistance member. accompanyin rawings in which In the operation of the cylinder the free ends of Fig. 1 is a general perspective V po th the piston rod are alternately and/or selectively mobile crane when viewing a rear end portion employable to efiect the desired angular movethereof;

ment of the boom in the one or in the other di- Fig. 2 is a partially broken-off side view of the reetion. assembled unit represented by the sub-frame car- According to one feature the boom is mounted il g t e Qm Q ry D m; V

ona platform which in turn is pivotally movable 3* ais'omewhat "diagrammatic top view The mobile" crane "indicatingi'thei potentl'al l" swinging moi/" ntere the boom;

about a jve'rtical asis .uponfa vehicle jrmm hydrauliclcylirid'er withiits two1-'ended .p to extends substantially transversely,of,the vehicle l y s a; similarly":diagr'arnmatic side -view of frame and-isefiectiv'e betwenI it'andl thej'plafi the F mobil fa e m sa! y s t form tofeffe'ct lthe'swinging movement of"the, Figf '4 is"asep'aratepitial viewof the top side boomin'the desiredjdirec'tion; Q oithe boom showing ahydrauliccylinder n1 7 JAcCoidiiigto a morelspecific' ,ieaturel the c ln. therewith for raisi and lowering esteem d derlislfasjtened'to theunderside of the platform i .1 *1enlarged:detailedplanview alsofdia whilethe respective free endsof ,the'ipistonlrod are adapted to operatively engage upon nthe cor sp n in sid s f the eh cl ir m It i'samong' the'fadvantag'es'ftha t t g m s po tive 1 0 .v icltion h n atedfparts oithemovable'platform, has mum ofparts', andcan' be readily men 1 ma eas a sm ymt.

I e o di'n'si were; ea ur peration of theho fizqntal cylinder; viewtakel'i Fig/7 31011 th un df ai h ss rfr mef hi h ii a H carriesfthiereona'swingableb e 'carrying "p lat* fliig 9*is a cot; aljview-on-the'line' S -Staken form actuatedfby'thehorizontal'hydraulic-cyL der, 'That is to say the 'subfl-ifram with thepart's *Figfl 0" isj'an enlarged mp; vi'evv'o'f; the pivotal mounted thereon represents 'agunit'lofasseinbly connection'between theplatfc rrn'frame and subwhich in turn is' mountedonthechassis frame;

E he t res iiein th provision of an m 1 17 15 an" anal "ne on "theline I e-H draulic cylinder unitary with the boom'for 'ai's-f talgeni lifigllil'. ing and lowering a load on'the boom; "gs51 to'4show views of a mot'or trucl; having E The"inventionpossesses other objects feaa cabl 0 on the-front portion "oi'a'c'ha'ssis' frame ll supported'byirontwheels l2 and rear'wheels,

tures'of adVantaga-sonie of which withftheflfo going will be setforth ll'l th ej following'descr p l3, rtio'n' of' the chassiisframe tiOIi. In the fol] wing description and ,"in the isfjfixedlymountcd "sub -fr'ame 14 havin aver claims, parts will be identifiedby specific names t'iearutrigmipivot it abou which is swing-able a for 'conVf hi nceQbut they are' int'endedtojibeias" plitfdrmifime'" 3 overlying and" suPl Qrted by generic in their 'applicationto 'similar parts as 55 the sub frame l'4L '-The" re'a'r end portio'n ofthe' sub-frame l4 has rising therefrom and unitary therewith a pedestal l'l upon which is mounted at I 8 to be swingable about a horizontal axis the rear end of a loading boom l9 overhanging and extending forwardly beyond the drivers cab l the boom l9 upon the sub-frame l4 comprises a 1 horizontally extending cylinder 23 the longitudinal axis of which extends transversely of the platform frame 15. The cylinder 23 is fastened to the under side of the platform frame I 6 by means of bolts 23 and a, channel-shaped bracket portion 23 the shanks or flanges of Which are shown to be welded to the cylinder 23 as at 23, the longitudinal edges of these flanges thus being parallel to the longitudinal axis of the cylinder.

This cylinder 23 has a two-ended piston rod 24 the free end portions 25 and 2B of which extend from and beyond the respective ends of the cylinder. A piston 21 is fixed upon and intermediately of end portions of the piston rod. The free end portion 25 is adapted to contact and engage upon a wearing plate 28 fixed to the inside of one side portion 29 of the sub-frame l4. Similarly the opposite end portion 26 of the piston rod is adapted to engage upon a wearing plate 30 provided upon the inner face of the opposite side portion 3! of the sub-frame.

Details of the vertical pivot shown in Fig. 4 are more clearly presented in the detail of Figs. 10 and 11 showing the pivot to consist of a bolt 32 passing through eyes 33 and 34 provided upon the platform frame I6 and upon the sub-frame i 4 respectively, the bolt being secured by a nut 35 and a counter-nut 35 in a manner to allow for the swinging movement of the platform frame. a

The platform frame I6 (in Fig. 8) is shown to comprise a plate element 36 to the underside of which the horizontal cylinder is bolted. This plate element is marginally reinforced by angle irons 3'! constituting the frame proper. The platform frame I6 rests and operates upon the sub-frame [4 which is shown to be constructed of channel irons 38. The chassis frame II upon which the sub-frame is mounted is fractionally indicated in Fig. 8.

The operation of the hydraulic cylinders 22 and 23 can be controlled by a hydraulic master control valve 39 indicated near the drivers seat 40 in the cab I0, such control being efiective through a pump usuall driven by the engine and a system of hydraulic conduits herein not particularly shown.

The operation of the horizontal cylinder for effecting sidewise angular swinging movement of the loading boom [9 is now substantially selfexplanatory from Figs. 5 to 7, that is to say when pressure fluid is forced through a. flexible connection 4| into the cylinder this Will cause the piston rod end 25 to engage wearing plate 28 thereby causing the platform frame Hi to swing from its and-dash line position Ili while fluid from the opposite side of the piston is allowed to be displaced therefrom through a flexible connection 42. Similarly when pressure fluid is forced into the cylinder to act upon the opposite side of the piston through the connection 42, this will relatively shift the piston rod in the opposite direction so that the piston rod end 26 engages the stationary wearing plate 30 causing the platform frame I 6 to swing from its full line neutral position, for example, to the dot-and-dash line position I6", while fluid from the opposite side of the piston is being displaced through the connection 4|.

Connected to the rear of the pedestal l1 and also carried by the platform frame l6 upon the rear end thereof (see Figs. 3 and 4) is provided a bin or receptacle 43 adapted to receive counterweight material such as rocks or sand to help compensate for a load on the boom IS.

The boom is is composed of a pair of symmetrically disposed parallel channel irons indicated at 45 and 46 and suitably inter-connected at the top and bottom by a number of diagonal tiemembers some of which are indicated at 47. In this way the boom is constituted as a composite beam the hollow interior of which is occupied by a hydraulic actuating cylinder 48 the bottom end of which is pivotally mounted as at 49 within the boom to enable the cylinder to have slight angular motion about a horizontal axis. This cylinder 48 has an extendable and retractable piston rod 50 having at its free end a sheave 5! over which runs a Wire rope 52. The wire rope extends from an anchoring point 53 at the free end of the boom over sheave 5i, then over another sheave 54 mounted at the free end of the boom, and terminates in a load-hook 55. Because of this arrangement of the sheaves any change in position of piston rod 50 will result in a shift of the loadhook double the distance of the shift of the piston rod. A lowered position of the load-hook 55 is shown in full lines while a raised position thereof is shown in dot-and-dash lines. The cylinder 48 which mayherein be termed the boom cylinder can be actuated hydraulically from the drivers seat by master control mechanism indicated at 39 in a manner similar to that in which the other cylinders 22 and 23 are controlled. The controlv is suitably such that all cylinders are doubleacting, that is to say they are hydraulically power-controllable in both directions of movement of the piston rod.

I claim:

1. Hoisting apparatus comprising an overhanging boom, a platform frame carrying said boom, a horizontal base frame carrying said platform frame, means for pivotally mounting the platform frame on the base frame for angular movement about a vertical axis relative to said base frame, actuating means for effecting said angular movement in both directions comprising a horizontally disposed hydraulic power cylinder having a two-ended piston rod with each end extending from and beyond a respective end of the cylinder, said cylinder being attached to one of said frames while said piston rod ends are adapted to operatively engage respective opposed portions of the other-frame.

2. Hoisting apparatus according to claim 1 in which the cylinder is fixed to the under side of the platform frame.

3. Hoisting apparatus according to claim 1 in which the base frame comprises a vehicle frame and the cylinder extends transversely thereof.

4. Hoisting apparatus according to claim 1 in which the base frame comprises a vehicle frame and the cylinder extends transversely thereof, and in which said piston rod ends are adapted to operatively engage an associated adjacent side portion of the vehicle frame.

5. Hoisting apparatus according to claim 1 in which the base frame comprises a chassis frame and a sub-frame attached to the top side of the chassis frame, and in which the swingable platform frame as well as the horizontal cylinder is mounted upon the sub-frame.

6. Hoisting apparatus according to claim 1 in which the base frame comprises a chassis frame and a sub-frame attached to the top side of the chassis frame, and in which the horizontal cylinder is fixed to the under side of the platform frame and the platform frame is swingably mounted upon the sub-frame.

NORMAN E. TORGERSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

